I have a flow chart from Mitchel. The tests on all circuits have been done. With a new sensor. Temp readings are higher then actual temp and all references and grounds are good. I replaced signal wire back to pcm. It had no continuity. I have scanner data but still codes as high volts. Also found that if pcm was replaced(it was) may cause this code although code was there before new pcm! What next? Re-flash and vin I'd set again?

Seems that you did all there is. That is all that I could imagine on it, but wait there may be another expert who has more. I will opt out and open it back up. Please DON’T REPLY to this post as that will lock the question back to me, also DON’T RATE THE ANSWER yet, someone should be along shortly, I’m sure, thanks and sorry I wasn’t able to help with it.

hello Brad, Mark here,,,This Dodge ram has a P0073 code for intake air temp voltage high.I have fallowed a diag. chart from Mitchel. ohm tested all wires in circuit, and found one fault withtemp signal to pcm to be open, replaced wire and still have the code.It will not clear. The truck has a new pcm, for other problems and I have already repaired a problem with theAPPS throttle peddle. the temp code was in it from before , where do I go from here, all circuits test good for resistance, I have ground and 5 volts at pcm supply, also good grounds and volt reference to other sensors sharing the grounds and supply!

I see that you have checked the wiring and also replaced the PCM, but per my wiring diagrams the ECM directly controls the Intake temp sensor.. I attached the diagnostics for P0073 to help... If the sensor is new and the wiring ohms good then I would replace the ECM...